A novel metal-coated fiber Bragg grating (MFBG) pressure sensor based on the thin-wall strain cylinder with
temperature compensation was designed and fabricated. According to the elastic strain principle, the theoretical analysis
of the strain distribution of this structure was described by calculation and simulation software Ansys. A sensing
MFBG1 was soldered on the tangential direction on the exterior surface of the thin-wall strain cylinder, and another
MFBG2 was soldered on the axial direction to compensate the effect of temperature. The experimental results indicated
that the cross-sensitivity of pressure and temperature of this sensor can be self-compensated well by this method. In
addition, the actual measurement pressure range from 0 to 42 MPa with a high pressure sensitivity coefficient of 0.0496
nm/MPa. Simultaneously, the measure range of pressure can be adjusted by changing the structure material and the
geometry size of the sensor. This kind of sensor has potential applications in the sensing measurement at harsh
environment.